Sarah Cuthbert-Kerr of the NTS said while experts cannot yet confirm the item’s identity, it was an exciting find.

He said: “Signs from the battle are rare and there’s very little evidence, so any finds are potentially very significant.

“Lots of pottery and other bits and pieces were found during the dig on June 19 and while some items seem very exciting, they require further investigation to date them and see if they are connected to the battle.

“We can’t really confirm how likely it is that Danny’s cooking pan dates that far back yet and it will be a few weeks before we can determine this.”

Mr Clifford, a former Royal Engineer who used detectors to track down mines and explosives, has been a hobby detectorist since he left the army in 1999.

He travels across Scotland in his mission to find old and unusual coins and artefacts.

He said: “It’s exciting when you see things coming out of the ground. The oldest coin I’ve dug up was a 1242 King Alexander III I found in Oban.

“I also found a blood-letting fleam [a surgical instrument used bleeding patiens] from the 1700s in Trottick [Dundee].

“The strangest thing I’ve found was a Dutch 1923 coin with the Queen’s head cut out.”